Roll-end grinder



G. w. BINNs ET AL n 1,788,046

ROLL END GRINDER Filed Jan. 22. 1929 6 Sheets-Sheet l Jan. 6, 1931.`

Jan-6, l931- G. w. BlNNs ET AL n* 1,788,046

. ROLL END GRINDER n Filed' Jan. 22. 1929 e sheets-sheet 2 n (l) u y I atto/cmq n Jan. 6, 1931. G. w. BINNs E1' AL.

ROLL END GRINDER Filed Jan. 22, 1929* 6 sheets-sheet s 3mm/1to1 ''faaf WEA/ms C2i/WHY?- 5007// dumm,

Jan. 6,1931. G. w. BINNs ET AL 1,788,046

ROLL END GRINDER Filed Jan. 22. 1929 e sheetsheet 4 wat Jan, 1931. a. w; mns :TAL 1,788,046

' nom. am: mma

rma .ma` 22. 192s e snms-snm 6 I aff- 5 i v I. 7k

- K 107 n \\\t} o o a 6 Y fami /fy u/ j/// C2i/V507 .5007# 25/ /76 /Z 75 e 5 f' onononw, BINNS ANDCLMENT Booirii, or crNcrNTrgon-Io, "Assiiois, TociNi Patented Jan. 6,'1931 Y omo ' yROLL-:pisani articles. i

rolls f for antifrictio'n' bearinvs lWithout the use lof* chucks or like holdingfi One ofthe principal objects'of the present 1 invention'is the provision'of a machine which 'Will' make possible the accurate' grinding of a terminal-portion l of various larticles such as xtu'res.` l A further ob 'ect of the invention is the provision'o'f a'mae ine iyhich will automatically, accurately position andholdrthe article to be voperated upon insuchffmanner thatfthe surface produced-by the grindin operationwill r be located in accurate andl de nite yrelation t0 the body portion of the article.

A further object of the inventionistheprovision' of a machine particularly adapted for use iiiI formation-'ofthe end terminus orfseat engaging portion'of a tapered roll which will produce a series of rolls eachhavi'ngltheh'terlm'inal Iface thereof in' definite spaced relation to a' predetermined' diameter yoff the roll whereby the several rolls may-be mounted-1n a single' bearing" with their lposition relativo to the "bearingdetermined by-said formed termini fand the races in Whichthe rolls are mountedjwill hearl With equal pressure upon allof the 'rolls equally distributing thek bear- A 4 tion of the machine and wheel oscillating mechanismcarriedthereby;

ing load or strain andconsequently providingr a bearing of maximum lifean'd" eiiiciericy; n

An additional object of the invention is'the provision of animproved' machinefin which the articles will' be automatically introduced, properly locatedand supported duringgrindingy and automatically eJected at a predetermined point 'in thec'ycleof operations of the machine and in Which'thegrinding perform ance will be substantially continuous and idle time necessary for introductionand `eJection of work will reduced to aminimum.

A further object of the invention is the ro-. vision of a machine Whiclrmay he utilize for the roduction vrof Veith'erilat or form terminal sur aces as may be preferred.` Other objects and advantages of Lthe present invention should be readily apparent by reference-to the following specificatlon considered 1n controlling spindles and. adjusting i3-3 of Figure 1.

'of Figure 9.-

junction iwi-th wtliej 'aocoiiilanyini drawings forming a party thereof'andy will beunderstood thatwe inayinakeanyfmodifications in the -s ecific structural detailsli'ereiiishown.,

' and' escribed'within the-scope' of appended claims Without departing fromorexceeding `the spiritofthe'invention.- v Figurej'lis ajperspective "viewof one embodiment :ofthe invention.` Figure 2'is a sectionthrough the work con- 1 A mechanism therefor online 2-42 of Figure l; g -Figure 3 is a 'plan view of the work-supporting and controlliiigmechanismsivitli the v machinefcolumn shovvn'pin section Aas on line f Figure'a4 is an enlarged fragmentary plan view of the'work'fcarrying andl introducing disc With-parts broken awa to'illus'trate the t actuating means for thelwor introducing and ejector'mechanisms.`

f -Figure 5`is *ai fragmentary `lsection through the work as on llne 5-5of igure 4 ,showing the grinding'Wheelfengagement therewitln j Figure (l-'is a fragmentary; sectional view stop n, foi" limiting outward Amovement f the 5 injector actuatingcami L f y Figure 48 is a rear view of the column por- `Figure 9 is a horiz'ontals'ection taken on line 9;;9 of Figu'ref'S illustrating the' wheel oscillating and adjusting mechanism;

f1 Figure 10 is a fragmentary section'through the column portionshowing the wheel spindle adjustmen'tand f Figure ll-is afragmenta'ry section through the Work controlling disc'truing mechanism taken' as online 11-'11 of Figure 1'.

.Figurey l2 isa section taken'at right angles ,tov-Figure 5"illustratingftheiuse of a formed grinding wheel intended to produce a combined flat andy tapered Lportion on the terminusof the Work,"and; f-

'Figure I3 isa fragmentary plan-viewvshowing a slightly different arrangement of grinddiscs and relative positioning of the work rest blade.

In the drawings the numeral designates the bed of the machine having the ways 26 bearing the left hand slide 27 and right hand slide 28. Y

These slides are respectively adjustable longitudinally of the waysortransversely of the bed by hand wheels 29 and 30. rSlide 27 has jou rr 1 a .led therein the vertical spindle 31 and sli'cle284 tl1'spindle32. These spin- A'dles are respectively yprovided with worm gears 33 and 34 meshing with Worms 35 and 36 which are splined on drive shaft 37 journaled in bearingv 38 carried by the bed Aand slidably engaged within the anti-friction bearings 39. and 40 ofslides -28and 27-respe'ctively, y This yshaftmaybe suitablydriven 'as .Y bypower applied vto pulley-41tliereony yheforegoing constructionrender-sitpossibleto impart `limited back and forward in- Idivi'dua'l movementto the slide members, the

f worm riding with itsadjacent worm gear and the timing of'drive of theparts beingunaffected by said lateral adjust-ment.:kv It [will lbe noted that in Ithefforrn of constructionl workpiecejsurfac'e. I nthe present instance this sur-face has .been shown ati-43 as having a taper corresponding tothatvof the yfrustoconical tapered roll 44 to besupported there- `45 to,- facilita .te ejectionof a 4finished work piece. Shaft 3l Ibears a ,secondavork controlling disc 46l1av1ng ag correspondingfbevel'ed surface 4 7 disposedin"peripheral opposition tok the surface' so-.that when work piece 44 isinv positioniand 'jointlyengaged bysurfaces-43 and ,47 it will spin about a Disc 46 carries .ther-work introducing vand ejecting mechanismgwhieh will `now bedescribed, particular `reference'- being made to Figures.' 3 ancl4V of the drawings. v

Formed in the upper Y'face of disc 46 a radially; extending groove or slot .48 for :plunger 49 coupled by pin 50 with slide block 51 riding on .the upper surface of disc46 and received Ibetween .the furcationsy 5 2 of rock lever 53.1 Thislever as particularly shown in Fifrure 6 is pivoted to ear54 partially subtenling the segmental shapedaperture 55 indisc. v46: and has a depending portion-'56bearing, an anti-friction roller 57 for engagementwvith theactuating cam 5S. lThis cam is sup orted on -pivot 59 secured to plate 60 jcarrie bythe bracket 27 andsurserves to 'vary the tension of the-'spring and thus the'outward urge of the main portion ofthecam as respects its pivot 59. An abutment on the under side ofthe cam by contact 'With'adj ustable stop 'screw 66 ,onpla'te 60 serves to limit this resiliently actuated outward movement of the cam. In operation, as disc 46 .is rotated bringing slot 48 toward the inner side ofthe machine or in oppositionito disc 42, roller 57 will reach the low portionof the cam and continue there-around in engagement therewith.; Prior to this movement and While .the lever andslide block 51 are held in their innerpositiongby action of spring 67 the work piece 44 hasfbcen placed in slot 48 adjacent'injector plunger .49 as shownfin Figure 3 for example.y

, -As'the disc continuesto rotate wit-l1 roller f 57-in contact with the cam and past the center of pivotance ofthe ca m member, the rise of the cam will outwardly oscillate the lever yabout its pivotforcing the plunger-and work piece outward.- 1 ."lhisoutward movementof .the- .work is limited by the V-shaped ,guide plate 68 supported by .the bed in-r termediate the two discs. -When such movement-islimited, continued movement of the lever and roller will rockftlie cam inward awa-y from its limiting stop, and increase the tension on spring62 Thisinovement will be 4for exampleffromthe dotted line position indicated in Figure 4 to the fullline position thereshown. a

As the. rotation Vproceeds the. work piece of guide plate 63, when the4 pressure of the cam against the lever will snap the njer-ttw' 49 outward andv the kwork .will be pressed into the `space between discs42 and 46, being rewill be pressed toward surface-43 of disc 42 andvheldasindicated inFig'ure 5. y

. When 1n thiS position, rotation of the discs ..42 and 46with theirsurfaces frictionally en- :gagement with the work pieceand the work f gagingthe Work Vwill vspin or rotate thework while the relative lateral, adjustment of the two discs willspace their upper Ysurfaces a prescribed distance, corresponding with desired work diameter yso that irrespective of the initial length of the workcwhether long -or short, or the general section of cone which it may form whether-near the base or the apex, a given frustro-conical-portion will be peripherally supportedand rotated between tot the machine. o

Vther two discs ksaid portion consequently havtheijpro3ecting" portion ground .oitr in 1n denite relation to said upper ysurfacesof the twodiscs All articles'produ'ced. bythe process will have the terminal `surfaces so produced yin definite relation to a given diameter lofthe work piece.- y y Lthe twoy discs andy theirA "speed of rotation is suchas `to'retain'and spin the work therebetween asufiicient periodot' The diameter of time to permit offproper grinding during a. single revolution o the discs. As slot 48 ap.

fproaches they work in grinding position, but lprior'to' its arrival at this positiomthe notch V in disc` 43 ywill be i brought intol alignment with the workreleasing,thepressurc on one side thereof. At this same tin'1e ,ejeotor 'pluri er 72 carried in lsocket 73-in` disc-46 will e forced outward ay prescribed limited amount by spring 74 kicking the workpiece out of position ,betweenfthe surfaces 69 and 70 by Way of ynotch 45 into dischargechute 75. This clears out the workingposition `ready for reception of the next work piece, the respectiveposition'` of4 the parts for ejec.

tion land introduction of workbeing best understood" by comparison vof Figures?) and v4.

'For y'performance -of the grinding y operation bed 25is vprovided with a suitable vcolumn struct-ure 76 having mounted thereon yslide 77 in whichis journaledthe grinding wheel spindle 78,,d'riven from suitable ysource of power asjby beltY 79. Theposition,of'this slide is preferably adjusted by screwBQ beari ing worm gear 81 'j inmeshed with worm'82 at the vtop of the column rotatable Lbyvhand wheel 83. This'facilitates adjustment of the vertical position ofthe wheel fromV the front vSpindle i 78 `bears lcollet u 8,4 for grinding wheel 85 andismounted both for rotation and axial sliding movement in its bearings; This axial sliding movement is preferably attained through sleeve `86 slidably but non-'rotatably mounted iny grinding Wheel slide 77 and conpled with the terminus ofspindle 78 bythe antifrietion bearing structure 87 indicated in Figure 9. v This 'sleeve provides lattachment -for` lug 88 pivoted to oney` end of lever 89 havin an arcuate slot 90 receiving the, adjustab e'fulcrum `screw 91`borne by lever 92, pivoted `as at 93 to the slide 77.. A vertical rock shaft 94 has an arm 95 coupled by pivoted block 96 with the furcated end97 of lever 89 for oscillationthereofabout fulcrum 91, the

amountfof reciprocation impartedto the pivot 98 of the lever`89 and'consequently'7 thedegree of oscillation'of the lever 89 and spindle 7.8

being' dependantonthe position of pin 91 slot 90. 'YOscillationoffthe grinding wheel spindle intimed relation to the ejection'pland.

injeti'onofworkis affected by' means of a cam l99 carried by disc 42 andengaging follower 100 on-Vslide bar 101. Thebar isurged f inthe' direction of the cam `by spring 102 and r has afrack portion 103 meshing with pinion 104 near the lower end of the rock shaft'.

Consequently, .back and forth movements-'of kkmember 101, alternately u effected 1 byv -spring 4102 and cam 99 willcause corresponding reyciprocation of the grinding wheel spindle, alternately j move the grindingl .-wheelffrom a ,position laterallyvdisplaced from the work to a .position overlying thework and reverse.

This .both facilitates insertion and. removal of the work and also. prevents any ypossi-ble formation `of grinding lines "due to maintenanceof the grindingawheel :in an axially ixedposition relative to thefwork. In Fig-r jure l12 of the drawing the. generalvstructure is thersarneas-that 'ustdescribed with the exception that the grinding Wl1eel85 in place of' having a *planer or cylindrical peripheral grinding face as indicated in vFigure 9 Vhas a f contoured falce such that the portion 85V grinds on end of the roll at right angles to the axis thereof AWhile it. has aisecond portion 85" formingythe second lbeveled ysurface 105.0n

the work. Itywillzbe understoodthat byodif'- i lWise. varying the principlesl or operating mechanismsfinvolved. y. As it yis -of particular importancethat thework ,engaging surfaces l 43 and 47 of the two controlling discs be simi;`

` larlinfform, angle and thelikein order Athat the surface produced may be normal tothe axisof thel work piece' u se in constructing and maintaining these surfaces ispreferably made of a special truing device sucliasshown iny Figurell. This devicecomprises a bracket 106fdesigned to beseculed to the appropriate slide ,27 ory 28`as indicatedin Figure 1, by screws or bolts 107 .and v108. This bracket carries a transverse. slide 109 shiftable by..

screw 110 yin aidirection toward and .from the face 'of thejdisc to be trued. Pivotedto .the slide is a sleeve 111 retained in desired ang'uf larly adjusted position by screw 112 and having keyed therein the plunger sleeve y113 which may befed up and down L,past the surface of the vdisc 46 for example, by feed screw 114 actuated by handwheel 115. VThis sleeve,v

bears a vsuitable y.turning ltool l116. Consequently,asthedisc is rotatedthetool may be,

moved `down, lat the proper angle across the surface of theL disc turning itoff Vto prescribed angle and propersurface. i v ,-f i, u r,From the foregoing description considered i-n conjunction with the drawings, theopiera-l tion fof ounimproved machine should be readily understood 1 and it will -befV seen. that s fonfp'ower'beinfg suitably applied tothe discs 42'and146 an to the grinding wheel, ittis 'merely necessary Vfor the operator on each Iotation'fof disc 46'to 'place' a work piece in slot 48; .Continued rotation of the parts will then fperniit-the work piece to`be introduced between .tlieguides therefor, maintained at Lthe proper height by engagement of the-discs with d ianietrically opposed portion's'tliereof,

said end is at a'p'roper' distance'froin the'prescribed diameter of tlieworkpieoe'so that the end may be utilized in maintaining and locating the roll-in subsequent proper operative position in an anti-'friction fbearingfor the like.` f f- Y, The grinding having been completed,` the spring ejector 7 2 will serve-1 automaticallvto tlirowout:thefinished work piece justfprior to tlieinjection of a new work piece with'the result that a workpiece is Ipractically `continuously in operative position within thema'- chine and idleV or non-grinding time yof the machine is reduced to a minimum.

Itvwill of course, beil understood that while the present invention has beenparticularly described in conjunction withl` the `grinding oftapered rollsvthat are'tliferefore supported entirely l yby y"lateral engagement4 there'v'vith;k

that by-utilizationo'fa" bottom rest contoured faceon the wheels or the like,=an'y article of circular form-in crosssection within thelsifzel limits of the machine may be correspondingly, satisfactorily `rinserted,V rotated Aand ground; i' i 'd Itwill further Vbe understood that in place y ofthe workv being held lsubstantially'on'the toward the grindingposition.

common center line ofthe pair of driving discs-as is indicated. by Figure 3 for example that tliefw'orkfiest blade 70 may be so positioned, as indicated in Figure 13 for example that .the work will,4 be off-set as r espects lt h iisV center line so that it 'will be substantially wedged against the Adisc 42 by the bevelled edge 7 5 on. the Aterminus of thel feed slot in disc'46. y,

V'I .his will cause a' tight 3-p`oint engagement of the' work'between the 2 discs l42 and 46 and the angle top workv rest 470 so'thatlany possible canting or play of" the work piecey steady'ing member f or `lthe work duringthe' grinding will have to dol solely with the func!V tion of'a guide for the'work fas itis moved n will further tailored antan this iig-nre disc .46:has .been shown'l of less diameter than i disc 42 with the resultthatthere-will be -a difference in the surfacespeedsof-the periphvgrinding wheel.

Y pressed position overlying eries of thetwo discs when' their spindles are synchronously rotated, ythe slower ymoving disc/16 additif'inal ,thrustv 'rml" yholds the workagains't the work 'rest mem er 120. Ashasbeen mentionedytheJ Cam 9 9 serves" 'to force'rod 101 rearwardly and'consequently ing'122 therefor with asuitable clanip'scre'w i or other locking devicef12 3 engaged in the collar124. 1 i Clamping of this member when the rod r 101 is in rearward position will lock the member and consequently the' grinding wheel yin this adjusted position and tlie'cain 99 may rotate freelyy Without effecting the position of the parts until by'loosening of clamp member123 rod 101 isreleased rendering cam 99 and spring 102 successively effective.

WVeclaini: j Y 'A 'j ,i

1. Agrindin machine vinclud-ing a pair of opposed rotata le discs haa'iving their peripheries contoured tofcorrespond with the Work piece being operated'fupon', means for rotating the discs in a common direction about their axes aty thesame perilplieial speed,

means for supporting a wor piece inter.- mediate the discs for lateral engagement vand rotation by the discs', the contoured portion of thediscslimiting the axialmovement of the work pieceand `a grinding vmember supported adjacent the Work engaging means for operation onthe Workjwhile rotated by the discs.l '2. A grinding machine lincluding.; fa pair of peripherally ropposed rotatable discs, means for rotating the discs in' a coinniolji direction about their ,axes at the saine periph; eral speed, means for vsupl'iortinfg.; a work piece intermediate the ldiscsffor lateral engageinentand rotation by the discs, a grind-fingmeinber vsupportedadjacent thework engag ing means for operation on the work 'while rotated by the discs,y `and meansffor auto'- matically introducing a work ativeposition between, the discs.^ v

3. A' grinding machine including a. pair ofy peripherally opposed rotatable discs,`

means for rotating the discs'inffa common direction abouttheir axes at 'the'saine pei-ipheral speed, means for supporting a; work piece. intermediatethe discs 'for lateralengagement.

and'rotationby the discs, a grinding meniber vsupported adjacent the work engaging means for operation lon'the work while rotated by the .discs, on

arecess formed in the peripherythereof and means for ejecting a workpiece'as.thea-acess means orrotat'ing'the discs in a common pieceinto opereof 'said' discs having' direction about their axes at the same peripheral speed, means for supporting a work piece intermediate thediscs for lateral engagement rand rotation bythe discs, a grinding member supported adjacent the work engaging means for operation on the work while rotated by the discs, means for automatically introducincluding a pair of opposedV contoured surfaces travelingin opposite directions, means for rotatably supporting a work piece between and in 'lateral engagement with said surfaces whereby thework piece will be -rotated thereby the contoured surfaces limiting the axial movement of the work piece, a grindin member and meansfor traversing the grinding member across the rotating work piece. f f, e n ,l 6. A machine of the character described, including a pair of peripherally opposed rotary ,discs ladapted to `receive Aand rotatea work piece there between, means for supporting a work piece between the discs, .a grinding member for operation on the'work piece While so supported, a ,work feeding mechanism, a grinding wheel reciprocating mechanism, and cam members lassociated with the discs for respectively actuating the work feeding and wheel reciprocating mechanisms. 1

7L A machine of the character described, includin a bed, a pair of slides carried thereby, spin lesjournaled in the-slides, rotary work engagingdiscs carried bythe spindles and supported by the slides in peripheral oppositlon, work positioning means between said discs lfor supporting a work piece in joint engagement therewith, ja 'column rising n from the-beda rinding.l wheel supported by the column and overlyingu the discs,fa11d means for traversing the grinding Wheel relativev tothedi'scs.'` y, e', Y

8.'A machine of the character described, includin` a bed,a` pair of slides'carried thereby, spin les journaledvin the` slides, rotary Work engaging discs carried by the spindles andlsupported bye-the slides in peripheral 'opposition, work positioning means between saiddiscs for supporting `a work piece in joint engagement therewith, a column rising from .the bed, a grinding wheel supported by the column and overlying the discs, means for traversing the grinding wheel relative yto the discs, -said means including a cam member supported by and rotatable with one of the splndles, interpreting mechanism operatively, associated with theV caml including an oscil-` latable lever actuatedby the cam and means coupling they leverwith the grindin wheel. y Q

, mg-work piece. -y

13. In a machine of the character de-` l spindle for re'ciprocation of the spin e.y

9. A'machne of. thecharacter described e including a bed, apair of slides carried thereby, spin les journaled in the slides, rotary work engagin discs carried by the spindles and supporte by, the slides in peripheral opposition, work positioning means between said discs for supporting a work pieeein oint engagement therewith, la 4column risin om -the bed, a grinding wheel supported I y the column and overlyingA the (11.868, means for traversingv the'A grindingv wheel relative to the discs, said means includinga cam member supported by and'rotatable with one ofthe spindles, interpreting mechanism operativel associated with the cam including an 104scillatable lever actuated -by the.. cam, and means for varying thefulcrum of said-lever to control the amount of reciprocating movement imparted to the spindle. f

4cam in the path of movement of the arm for resiliently, outwardly actuatin the plunger.

11. A grindingmachine inc uding a pair g5 of peripherally opposed rotatable discs'adapted to receive. a work piece therebetween, means for rotating the discs at a common peripheral speed, and with the opposed portions of their peripheries moving in opposite directions -whereby they will jolntly `exert s rotating action on a Work piece held in p0si' tion thereby, one of said discsl having a work ejection recess formed in the periphery thereof, the other of said discs having a kick-out member cooperating with the recess to lej ect a work piece when the recess causes disengagement of the Work by the discs. 12. A grinding machine including ak air of peripherally opposed rotatable discs a apted to receive a Work piecetherebetween, means for rotating the discsat a common peripheral speed, and with the .opposed portions of their peripheries, moving in opposite directions. wherebytheywill jointly exert a rotating action on a'workpiece held in position thereby, one of said discs having awork ejection recess formed ri-n the periphery thereof, the other ofsaid discs lhaving a kick-out member co-operating' with the recess to eject a Work piece when the recess causes disengagement of the fwork bythe discs, work positioning means projecting between the discs, and means mounted on oneof the discs for pre-k senting a work piece to said work positioning means` and in position intermediate theA discs immediately afterthe ej ectionof the precedscribed, the combination with a pair of opposed work engagin members, ofa work support projecting f tween the members having a contoured extension extending along the -face of one of the" members, said member having a work receiving lslot formed therein,

a work injecting vplunger within the slot, and means for resihently urging the plunger outward in the slot to press the Work against the work support extension whereby the work piece will be automatically snapped into operative position between the work engagin members during its advance along its wor support. 14. A machine -of the character described including a pair of peripherally opposed 'rotary discs having opposedcorrespondingly contoured work engaging portions for automatically rotating and positioning a. work piece therebetween,-'means preventing tangential displacement of the work as `respects tothe discs, a 'nding member for terminal engagement with the work piece and means for supporting the grinding member in predetermined re ation to the contoured 'work supporting surfaces whereby the grinding member w1ll act -uniformlyvon successive Work pieces. l f

15. A machine of the character described, including ab ed, a pair of slides carried by the bed, spindles journaled in the slides and each having a worm'ge'ar thereon, a splined shaft journaled in the bed, drive worms splined on the shaft and in mesh with the gears of the respective spindles, and means for adjustin the slideson the bed, whereby the worms w' l automatically follow -their lrespective gears and relative rotary positioning of thel spindles will be unaifected by sliding adjustment thereof.

16. lA grinding machineof thenature described including a bed having ways,a pair of slides mounted on,the Ways for relative adjustment, work 'positioning discs rotatably Vsupported by the? slides, a column `rising from'the bed rearwardly of the Ways, a slide supported by the column for `adjustment towardk and from the discs, a grinding wheel carried by the slide for operative engagement with a work piece supported bythe discs the inding wheel slide rom the front of the mac ine including afeed screwjournaled on -the column and engaging the grinding wheel slide, a worm gearpmounted on the screw, a wormpmeshlng with said gear and having a forwardly. extending shaft, and an operating handlefor said shaft' overlying one of the work supportingfdiscs at the front of the machine. Y

17. machine of thecharacter described u xcludin r a bed, a work supporting mechamnnA 1n udinga rotary' spmdle carried by the bed, a column rising from the bed, a slide carried bythe lcolumn,- means for adjusting and means for controlliig-the adjustment ofy msec the slide on'the column, a grinding wheel spindle journaled in the slide for rotary'and with'the spindle, a rock arm s lined on the rock shaft and coupled with t e lever, and meanson the bracket for slidin the splined arm along the rock shaft -where y the reciprocation will be imparted'tothe grinding wheels indle irrespective of the adjustment of the slide on the column. c

18. machineof the character described including a bed, a work supporting mechanism including a rotaryspindle carried by the bed, a column rising from the bed, a slide carried by the column, means for "adjustin the slide on the column, a grinding Whee spindle journaled in the slide for rotary and reciprocating movement, means for reci rocating the grinding wheel spindle inclu ing a rock shaft journaledinthe column, means on the rotary spindle for oscillating the rock v shaft on rotation of the spindle, va bracket carried bythe slide, a l ever pivotally supported bythe bracket, means coupling the lever with the spindle, a rockarm splined on the rock shaft and coupled with the lever, means on lthe bracket for sliding the splined arm along the rock shaft whereby the reciprocation will be imparted to the grinding wheel s indle irrespective of the adjustment of the s ide on the column, and means for locking the grinding wheel spindleag'ainst reciprocating movement.

19. In a grinding machine the combination of a bed, means carried thereby for laterally engaging, supporting and frictionally rotating a work piece yabout an axis determined by the peripheral surface of the work piece, a rotating tool for operation on a terminal portion of the work piece to form same normal 'to the axis of rotation, and means for automatically positioning and ejecting the work piece relative tothe supportingv and rotating means. f

2o. In a grinding machine the cmbinain of a bed, means carried thereby having travelling surfaces for laterally engaging the surface of a `work piece to frictionally rotate same aboutan axis determined by said con-` tacting surfaces,-a rotating tool. for forming a terminal portion of the work piece normal to its axis of rotation, means forfadvancing and retractingI the tool-across said terminal portion of the workpiece, automatic 'means for positioning and ej ecting a work piece relative to the travelling surfaces'of the work rotating means, and .synchronizing means for operating the automatic loading and ejecting inding wheel spindle including aA i insane 7 means when the grinding wheel is in a retracted position. Y

21'. In a grinding machine the combination of a bed, means having travelling surfaces for suptportini and laterally engaging the surface o a wor piece to frictionally rotate Asame about an axis determined by said contacting surfaces, arotatin tool for operation on a terminal portion o the work piece lo to form same normal to its axis of rotation,

means for effecting a relative movement between the tool and work piece and means for automatically .positioning and e'ecting a work piece relative to the supporting rotating surfaces of the work vdriven means.

22. In a grinding machine the combination of a bed, means carried thereby for support-I ing and rotating a work ie'ce, a rotating tool for operationy on the wor piece, a spindle for the tool, and means for advancing and reytracting the spindle and tool relative to the work piece including a rotatin cam, a cam follower, a rock shaft operate by the cam follower, and means oscillated b the rock shaft and connected with the spin 1e for con.

verting the rocking motion of the shaft into axial movement of the spindle.

f 23. In a grinding machine the combination of a bed, means carried thereby for support-` 33 ing and rotating a work piece, a rotatin tool for operationen the workpiece, a spin e for the tool, and means for,y advancin and retracting the spindle and tool relatlve to the work piece including a rotatin cam, a cam follower, a rockshaft operate by the cam follower, a pivotall mountedrmernber operated by the rock s aft and connected with the spindle for converting the rocking motion of the shaft into axial movement of the spindle, and means for varying the relation between the pivot of the member and its connection with the spindle for changing thev lenIgth of stroke ofthe spindle.

n testimonyr whereof we aiix our signatures.

GEORGE W. BINNS. CLEMENT BOOTH. 

